Closure cap for paper milk bottles



Jan. 31, 1933. L. s. KOCH CLOSURE CAP FOR PAPER MILK BOTTLES Original Filed May 21 .Patented Jan. 31, 1933 1um;*sw-Es PATENT" *QF B LYDIA B. KOCH, OFN EW5YO RILiN. ;Y.

\ CLOSURE oar FOR rarriaiuinx norm-Les Application filed May 21, 1930, Serial No. 454,295. Renewed octobrf ajissa. 7

My invention relates to improvements in closure caps for paper milk bottles and the object of the invention is to devise a closure cap which is especially adaptable for a type 5 of bottle having a tapered upper portionlongitudinally corrugated from midway of its length into the flange of its neck.

A further object is to make such a cap as will interfit into the corrugations externally.

A still further object is to provide in a cap means whereby a portion of its contents may be poured out directly or withdrawn through a straw without removing the cap itself and yet the cap sealed so as to closethe openings and prevent contamination of the remainder of the contents.

To eifect these objects my cap is provided with a depending corrugated portion adapted to fit the corrugations of the flange and upper tapered portion of'the body and a v dished central portion concavo-eonvex in cross-section, having diametrically located orifices provided with pouring lips and a curved strip suitably pivoted and adapted to fit the concave-convex top and to close or uncover the orifices as may be desired and as hereinafter more particularly explained.

Fig. 1 is a perspective view of the upper a portion of a paper milk bottle provided with my closure cap.

Fig. 2 is a vertical section through the extreme upper portion.

Fig. 3 is a sectional perspective detail of the ,cap.

Fig. 4 is a sectional plan through the cap and upper tapered portion showing the relative position of the cap and corrugated portion when the cap is closed.

Fig. 5 is a similar plan view showing the 40 cap given a slight .turn so as to cause the inturned ribs of the corrugations to ride on the outturned corrugations of the neck at the upper end of the tapered portion.

11 the drawing like characters of reference indicate the corresponding parts.

1 is the upper portion of a milk bottle which is madeof paper of a suitable thickness. The portion 1 istapered from a point about midway of the height of the bottle and is provided with corrugations 2 made up of the longitudinal depressions 3 and the ribs 4, such depressions and ribs narrowing from the bottomtofthe'top and terminating in a neck portion 5 formed as describedin a former application by inturning'the top edge of the tapered portion by' spinning and 'swedging to form an i nternal seat 6 and an upstanding portion '7; s 1

8 is the capwhich is made with a depressed or'dished central portion 9in' concavo-conv x form and having tlie inner edge 10 resting i amount of resiliency,- the cap maybe forced honiealthoughits'lower corrugated edge may be'slightly less in -diameter than the outside diameter of the. upstanding portion? of the neck. But'whe'n forced home .itwill necessarily cling; to thetapered portion immediately underneath the. neck; the ribs and, de-

j pressions of the ca interfitting with the ribs and depressions or the upper' portion of tl e bottlefpiioper'g cu'rely-- held in position for ordinary usage but may be readily. removed by grasping the rim 111 with the hand and pulling upwardly thereon orit may be preferable to give the cap a slight twistwith the hand 'so as to It will-thus beseen,th'atvthecapwill be 86- throw it' around sufliciently in 'orderjto cause I the inwardly iexten dinglribs formed by the depressions 14' ofthe cap to ride onthe ribs as iiidicated 'in Fig-.a'whereby the cap nlay? be spread sufiiciently outwardl-y so that v it may befwithdrawn easily The my 8 asif r as nfow'f described isa i comp'l-e'te closure" and when removed enables, if it isdesired, thecompletecontents'of'the bottletobe discharged.

If, however, it is desired to withdraw only a portion of the contents I have provided in the concavo-convex portion 9 two openings 15 diametrically located opposite each other and lips 16 depressed or otherwise formed out of the concavo-convex portion 9 beneath the openings 15.

These openings are normally closed by a bridge strip 17 pivoted at 18 centrally. By

swinging the bridge strip, which follows the curve of the concavo-convex portion 9, around a sufficient distance the openings 15 may be uncovered and the milk poured out through the openings 15, the lips 16 forming a guide for directing the milk clear of the rim 11. I

If desired, howcverpa straw may be inserted through the openings 15 and the milk withdrawn thereby.

The openings 15 are only utilized when it is desired to withdraw only a portion of the contents of the bottle and reseal it. When it is desired to remove the whole of the contents, of course, the cap would be removed altogether. i 1

Such a cap as. I describe forms a strong and complete closure, not liable to come off except it is removed by the hand or other means. i 1

In practice I prefer to coat the cap with paraflin and place it in position when it is warm, so by this means I provide a perfect seal both at the seat as well as on the exterior of the flange surrounding the same.

What I claim as my invention is:

1. A closure cap for milk bottles comprising a circular top dished so as to provide an annularhollow flange with the outer flange which depends around the neck formed at the upper end of the tapered portion and is provided with circumferential corrugations designed to register, fit into, interlock and grip the corrugations in the upper portion of the bottle.

2. A closure cap for milk bottles comprising an outer rim having a depending portion adapted to grip the flange of the neck, and a central concavo-convex dished portion provided withdiametrically located openings having depending lips and a bridge strip centrally pivoted and following the contour of the concavo-convex portion and adapted normally to cover the openings and. to be swung to uncover them.

3. The combination with a paper milk bottle provided witha corrugated upper portion terminating in a circumferential flange at the top having an inwardly extending seat,

of a closure cap having a hollow rim formed by a dished portion and depending flange, such flange being corrugated circumferentially in its lower portion and adapted to fit the corrugations of the tapered portion beneath theflange of the neck.

4. A closure cap for milk bottles comprising a circular top dished so as to provide an annular hollow flange with the outer flange which depends around the neck formed at position.

LYDIA B. KOCH. 

